Steam, carbon dioxide and nitrogen combined injection energy-saving yield-increasing oil extraction device

Abstract

The invention belongs to the technical field of oil production devices, and particularly relates to a steam, carbon dioxide and nitrogen combined injection energy-saving yield-increasing oil production device which comprises a gas injection well pipe, the upper end of the gas injection well pipe is fixedly communicated with a steam inlet pipe, a carbon dioxide inlet pipe and a nitrogen inlet pipe, and a gas mixer is installed at the upper end of the gas injection well pipe. The gas injection well pipe is provided with a plurality of groups of flange connecting assemblies, and the device further comprises three groups of introduction quantity regulation and control feedback mechanisms, a steam pretreatment mechanism, a plurality of groups of compensation pressurization fixing mechanisms and a compensation pressurization starting mechanism. Steam, carbon dioxide and nitrogen are forcibly mixed under the turbulent flow effect of the gas mixer, the problem that the displacement effect is uneven due to large gas physical property difference can be avoided, whether pretreatment is conducted or not can be automatically judged according to the steam introduction amount, trickles are dispersed, condensate water generation and pipeline corrosion are reduced, and the energy consumption is reduced. Meanwhile, the locking force of the flange connecting assembly is automatically supplemented according to temperature and air pressure changes, leakage is prevented, and damage is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of oil production equipment, and in particular relates to a steam, carbon dioxide, and nitrogen co-injection energy-saving and production-increasing oil production equipment. Background Art

[0002] Against the backdrop of surging global energy demand, oil development remains the core of energy strategies for all countries. Deep-sea oil drilling equipment in the marine engineering equipment industry, such as underwater Christmas trees, blowout preventers, and underwater oil and gas production equipment, are deeply integrated with energy-saving and production-increasing technologies such as steam, carbon dioxide, and nitrogen flooding. Based on the continuous research and development of new energy-saving and production-increasing oil production technologies by scientific researchers, methods such as steam, carbon dioxide, and nitrogen flooding are widely used to increase the output of oil wells. These methods inject media such as steam, carbon dioxide, or nitrogen into the oil layer to reduce crude oil viscosity and increase oil layer pressure, thereby achieving the purpose of increasing production.

[0003] Steam injection can increase the temperature of the oil layer, reducing crude oil viscosity and enhancing fluidity, making it easier to extract. Carbon dioxide can dissolve in crude oil and also reduce its viscosity and interfacial tension, making it easier for it to flow out of the rock pores. Nitrogen is an inert gas that does not easily react chemically with substances in the oil layer and has high compressibility. Injecting nitrogen can replenish the energy of the oil layer, increase the oil layer pressure, and drive the crude oil to the production well. At the same time, steam and carbon dioxide can also increase the oil layer pressure to a certain extent, maintaining the oil layer's driving force. The combined injection of steam, carbon dioxide, and nitrogen can improve the fluid mobility ratio in the oil layer, making the injected fluid more evenly distributed in the oil layer, expanding the swept volume, and increasing the oil recovery rate.

[0004] In actual applications, the injection ratio and degree of steam, carbon dioxide and nitrogen need to be adjusted according to the type of oil reservoir. Due to the high temperature of steam, when the steam flux is large, the high-temperature steam directly impacts the carbon dioxide and nitrogen, which will cause condensation due to the sudden temperature difference. The condensation water combines with carbon dioxide to easily form carbonic acid, which will cause greater corrosion to the pipeline. Summary of the Invention

[0005] The purpose of the present invention is to provide a steam, carbon dioxide and nitrogen co-injection energy-saving and production-increasing oil production device in response to the above problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions: a steam, carbon dioxide, and nitrogen combined injection energy-saving and production-increasing oil production device, comprising a gas injection well pipe, the upper end of which is fixedly connected to a steam inlet pipe, a carbon dioxide inlet pipe, and a nitrogen inlet pipe, a gas mixer is installed at the upper end of the gas injection well pipe, and multiple sets of flange connection components are installed on the gas injection well pipe, and further comprising:

[0007] Three groups of inlet amount control feedback mechanisms are respectively fixedly connected to the steam inlet pipe, the carbon dioxide inlet pipe and the nitrogen inlet pipe;

[0008] A steam pretreatment mechanism is fixedly connected to the wall of the steam inlet pipe;

[0009] Multiple sets of compensating pressurizing fixing mechanisms are fixedly mounted on the flange connection assembly to enhance the fixing force of the flange connection assembly;

[0010] The compensating pressurization starting mechanism is fixedly mounted on the outer wall of the gas injection well pipe and is used to control the action of the compensating pressurization fixing mechanism.

[0011] In the above-mentioned steam, carbon dioxide, and nitrogen co-injection energy-saving and production-increasing oil production device, the intake amount control feedback mechanism includes an electric ball valve fixedly connected to the steam inlet pipe, the carbon dioxide inlet pipe, and the nitrogen inlet pipe. An encoder is also fixedly installed on the outer wall of the electric ball valve, and the input end of the encoder is fixedly connected to the rotating end of the electric ball valve.

[0012] In the above-mentioned steam, carbon dioxide and nitrogen co-injection energy-saving and production-increasing oil production device, the steam pretreatment mechanism includes a buffer pipe fixedly connected to the steam inlet pipe, and solenoid valves are installed on the pipe walls of the steam inlet pipe and the buffer pipe. The buffer pipe is fixedly connected to a buffer box, and a porous distribution plate is fixedly connected to the bottom side of the inner wall of the buffer box. The inner wall of the buffer box is also symmetrically sealed with two sealing plates, and the rear end of the buffer box is fixedly installed with a two-way adjustment mechanism for driving the two sealing plates to move.

[0013] In the above-mentioned steam, carbon dioxide and nitrogen joint injection energy-saving and production-increasing oil production device, the compensating pressurization fixing mechanism includes a U-shaped positioning plate fixedly connected to the outside of the flange connection assembly, the upper end of the U-shaped positioning plate is symmetrically and movably inserted with multiple pressure rods, the lower ends of multiple pressure rods are fixedly connected to the same pressure block, multiple pull-up springs sleeved on the outside of the pressure rods are fixedly connected between the U-shaped positioning plate and the pressure block, the upper ends of multiple pressure rods are fixedly connected to the same pressure plate, the upper end of the U-shaped positioning plate is fixedly connected to a cover shell sleeved outside the pressure plate, the upper end of the pressure plate is fixedly connected to a force-bearing permanent magnet plate, and the top of the inner wall of the cover shell is fixedly connected to a force-bearing electromagnetic plate arranged opposite to the force-bearing permanent magnet plate.

[0014] In the above-mentioned steam, carbon dioxide and nitrogen co-injection energy-saving and production-increasing oil production device, the compensation pressurization starting mechanism includes a starting shell fixedly installed on the outer wall of the gas injection well pipe, the inner wall of the starting shell is fixedly connected to a plurality of guide slide rods arranged side by side, the rod walls of the plurality of guide slide rods are symmetrically slidably connected with a temperature feedback plate and a pressure feedback plate, the temperature feedback plate and the pressure feedback plate are fixedly connected to the starting shell with a plurality of return springs sleeved on the outside of the guide slide rods, the side wall of the temperature feedback plate is fixedly connected to the first thrust permanent magnet plate, the inner wall of the starting shell is fixedly provided with a first thrust electromagnetic plate arranged opposite to the first thrust permanent magnet plate, the side wall of the pressure feedback plate is fixedly connected with a second thrust permanent magnet plate, and the inner wall of the starting shell is fixed A second thrust electromagnetic plate is installed and arranged opposite to the second thrust permanent magnet plate, one end of the temperature feedback plate is fixedly connected to a conductive block, one end of the pressure feedback plate is fixedly connected to an electric connection strip arranged corresponding to the position of the conductive block, the other end of the temperature feedback plate is fixedly connected to a transmission rack, the other end of the pressure feedback plate is fixedly connected to an L-shaped extension plate, the side wall of the L-shaped extension plate is fixedly connected to a potentiometer and a reduction gear box, the output end of the reduction gear box is fixedly connected to the center of the rotating end of the potentiometer, the input end of the reduction gear box is fixedly connected to a transmission gear meshing with the transmission rack, the conductive block and the electric connection strip are connected in series to the power supply circuit of the force electromagnetic plate, and the potentiometer is also connected in series to the power supply circuit of the force electromagnetic plate.

[0015] In the above-mentioned steam, carbon dioxide and nitrogen co-injection energy-saving and production-increasing oil production device, the bidirectional adjustment mechanism includes two side plates symmetrically fixedly connected to the rear side of the buffer box, and a dual-axis motor is also fixedly installed at the middle position of the rear end of the buffer box. The output ends of both ends of the dual-axis motor are fixedly connected with adjusting screws, and the end of the adjusting screw away from the dual-axis motor is rotatably connected to the side wall of the side plate. The rod wall of the adjusting screw is threadedly sleeved with an adjusting plate, and two U-shaped synchronization rods are symmetrically fixedly connected to the side of the adjustment plate away from the dual-axis motor. The end of the U-shaped synchronization rod away from the adjustment plate extends through the buffer box and is fixedly connected to the side wall of the sealing plate.

[0016] In the above-mentioned steam, carbon dioxide and nitrogen joint injection energy-saving and production-increasing oil production device, the lower end of the flange connection assembly is fixedly connected to a U-shaped anti-slip plate, the lower end of the U-shaped positioning plate is inserted into the inner side of the U-shaped anti-slip plate, and the U-shaped anti-slip plate and the U-shaped positioning plate are fixedly connected by multiple positioning bolts.

[0017] In the above-mentioned steam, carbon dioxide, and nitrogen co-injection energy-saving and production-increasing oil production device, the porosity of the through holes on the porous distribution plate gradually increases from the middle to both sides.

[0018] Compared with the existing technology, the beneficial effects of the present invention are:

[0019] 1. Through the installation of gas injection well pipes, steam inlet pipes, carbon dioxide inlet pipes, nitrogen inlet pipes, gas mixers, and flange connection components, the turbulent flow in the gas mixer is used to force the mixing of steam, carbon dioxide, and nitrogen to ensure that a uniform mixed fluid is formed before entering the oil layer. This avoids the problem of uneven displacement effect in the oil layer and low oil recovery efficiency in some areas due to the large differences in the physical properties of the three gases (steam is a high-temperature fluid, carbon dioxide and nitrogen are room-temperature gases) that may cause stratification or local aggregation during injection.

[0020] 2. Through the steam pretreatment mechanism, the input flow control feedback mechanism and the two-way adjustment mechanism, it is possible to automatically determine whether steam pretreatment is needed based on the size of the steam input flow. When the steam input flow is large, the steam is treated so that the steam is dispersed into the mixing chamber of the gas mixer in the form of a thin stream, avoiding high-temperature steam from directly impacting the carbon dioxide and nitrogen pipelines, reducing the generation of condensed water caused by sudden temperature changes, and reducing corrosion to the pipelines.

[0021] 3. Through the set compensating pressurization fixing mechanism and compensating pressurization starting mechanism, the installation position of the flange connection component on the gas injection well pipe can be automatically supplemented with additional locking force based on the temperature change of the steam input feedback and the pressure change caused by the total input of the three gases, so as to avoid the problem of leakage of the gas injection well pipe caused by the increase of the sealing surface gap of the flange connection component due to thermal expansion and the easier penetration of gas under high pressure. At the same time, it avoids the problem that continuous excessive locking force will cause damage to the flange connection component and affect the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the input amount control feedback mechanism of the present invention;

[0024] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the steam pretreatment mechanism of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the compensating pressurizing and fixing mechanism of the present invention;

[0026] Figure 5 It is a schematic cross-sectional view of the compensating pressurizing starting mechanism of the present invention;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the bidirectional adjustment mechanism of the present invention.

[0028] In the figure: 1 gas injection well pipe, 2 intake amount control feedback mechanism, 21 electric ball valve, 22 encoder, 3 steam pretreatment mechanism, 31 buffer tube, 32 solenoid valve, 33 buffer box, 34 porous distribution plate, 35 sealing plate, 4 compensation pressurization fixing mechanism, 41 U-shaped positioning plate, 42 pressurization rod, 43 pressurization block, 44 pull-up spring, 45 pressurization plate, 46 cover, 47 force-bearing permanent magnet plate, 48 force-bearing electromagnetic plate, 49 U-shaped anti-slip plate, 5 compensation pressurization starting mechanism, 51 starting shell, 52 guide slide bar, 53 temperature feedback plate, 54 pressure feedback plate , 55 return spring, 56 first thrust permanent magnet plate, 57 first thrust electromagnetic plate, 58 second thrust permanent magnet plate, 59 second thrust electromagnetic plate, 510 conductive block, 511 electrical connection strip, 512 transmission rack, 513 L-shaped extension plate, 514 potentiometer, 515 reduction gearbox, 516 transmission gear, 6 two-way adjustment mechanism, 61 side plate, 62 dual-axis motor, 63 adjusting screw, 64 adjusting plate, 65 U-shaped synchronization rod, 7 steam inlet pipe, 8 carbon dioxide inlet pipe, 9 nitrogen inlet pipe, 10 gas mixer, 11 flange connection assembly. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] like Figures 1-6 As shown, a steam, carbon dioxide, and nitrogen combined injection energy-saving and production-increasing oil production device includes a gas injection well pipe 1. The upper end of the gas injection well pipe 1 is fixedly connected to a steam inlet pipe 7, a carbon dioxide inlet pipe 8, and a nitrogen inlet pipe 9. A gas mixer 10 is installed at the upper end of the gas injection well pipe 1. The gas injection well pipe 1 is equipped with multiple sets of flange connection components 11. The device also includes:

[0031] The three groups of intake control feedback mechanisms 2 are respectively fixedly connected to the steam intake pipe 7, the carbon dioxide intake pipe 8 and the nitrogen intake pipe 9. The intake control feedback mechanism 2 includes an electric ball valve 21 fixedly connected to the steam intake pipe 7, the carbon dioxide intake pipe 8 and the nitrogen intake pipe 9. An encoder 22 is also fixedly installed on the outer wall of the electric ball valve 21. The input end of the encoder 22 is fixedly connected to the rotating end of the electric ball valve 21.

[0032] The steam pretreatment mechanism 3 is fixedly connected to the wall of the steam inlet pipe 7. The steam pretreatment mechanism 3 includes a buffer pipe 31 fixedly connected to the steam inlet pipe 7. Solenoid valves 32 are installed on the walls of the steam inlet pipe 7 and the buffer pipe 31. The buffer pipe 31 is fixedly connected to a buffer box 33. The bottom side of the inner wall of the buffer box 33 is fixedly connected to a porous distribution plate 34. The inner wall of the buffer box 33 is also symmetrically sealed with two sealing plates 35. The rear end of the buffer box 33 is fixedly installed with a two-way adjustment mechanism 6 for driving the two sealing plates 35 to move.

[0033] The bidirectional adjustment mechanism 6 includes two side plates 61 symmetrically fixedly connected to the rear side of the buffer box 33. A dual-axis motor 62 is also fixedly installed in the middle position of the rear end of the buffer box 33. The output ends of the dual-axis motor 62 are fixedly connected with an adjusting screw 63. The end of the adjusting screw 63 away from the dual-axis motor 62 is rotatably connected to the side wall of the side plate 61. The rod wall of the adjusting screw 63 is threadedly sleeved with an adjusting plate 64. The side of the adjusting plate 64 away from the dual-axis motor 62 is symmetrically fixed with two U-shaped synchronization rods 65. The end of the U-shaped synchronization rod 65 away from the adjustment plate 64 extends into the buffer box 33 and is fixedly connected to the side wall of the sealing plate 35. The porosity of the through holes on the porous distribution plate 34 gradually increases from the middle to the two sides.

[0034] Multiple sets of compensating pressurizing fixing mechanisms 4 are fixedly mounted on the flange connection assembly 11 to strengthen the fixing force of the flange connection assembly 11. The compensating pressurizing fixing mechanism 4 includes a U-shaped positioning plate 41 fixedly connected to the outside of the flange connection assembly 11. The upper end of the U-shaped positioning plate 41 is symmetrically sleeved with multiple pressurizing rods 42. The lower ends of the multiple pressurizing rods 42 are fixedly connected to the same pressurizing block 43. Multiple pull-up springs 44 are fixedly connected between the U-shaped positioning plate 41 and the pressurizing block 43. The upper ends of the multiple pressurizing rods 42 are symmetrically sleeved with multiple pressurizing rods 42. It is fixedly connected to the same pressure plate 45, the upper end of the U-shaped positioning plate 41 is fixedly connected to a cover shell 46 that covers the outside of the pressure plate 45, the upper end of the pressure plate 45 is fixedly connected to a force-bearing permanent magnet plate 47, and the top of the inner wall of the cover shell 46 is fixedly connected to a force-bearing electromagnetic plate 48 that is arranged opposite to the force-bearing permanent magnet plate 47. The lower end of the flange connection assembly 11 is fixedly connected to a U-shaped anti-slip plate 49, and the lower end of the U-shaped positioning plate 41 is inserted into the inner side of the U-shaped anti-slip plate 49. The U-shaped anti-slip plate 49 and the U-shaped positioning plate 41 are fixedly connected by multiple positioning bolts.

[0035] The compensation pressurization starting mechanism 5 is fixedly mounted on the outer wall of the gas injection well pipe 1 and is used to control the action of the compensation pressurization fixing mechanism 4. The compensation pressurization starting mechanism 5 includes a starting shell 51 fixedly mounted on the outer wall of the gas injection well pipe 1. The inner wall of the starting shell 51 is fixedly connected to a plurality of guide slide rods 52 arranged side by side. The rod walls of the plurality of guide slide rods 52 are symmetrically slidably connected with a temperature feedback plate 53 and a pressure feedback plate 54. The temperature feedback plate 53 and the pressure feedback plate 54 are fixedly connected to the starting shell 51 with a plurality of return springs 55 sleeved on the outside of the guide slide rods 52. The side wall of the temperature feedback plate 53 is fixedly connected to the first thrust permanent magnet plate 56. The inner wall of the starting shell 51 is fixedly mounted with a first thrust electromagnetic plate 57 arranged opposite to the first thrust permanent magnet plate 56. The side wall of the pressure feedback plate 54 is fixedly connected with a second thrust permanent magnet plate 58. The second thrust electromagnetic plate 59 is arranged opposite to the second thrust permanent magnet plate 58, one end of the temperature feedback plate 53 is fixedly connected to the conductive block 510, one end of the pressure feedback plate 54 is fixedly connected to the electrical connection bar 511 arranged corresponding to the position of the conductive block 510, the other end of the temperature feedback plate 53 is fixedly connected to the transmission rack 512, the other end of the pressure feedback plate 54 is fixedly connected to the L-shaped extension plate 513, the side wall of the L-shaped extension plate 513 is fixedly connected to the potentiometer 514 and the reduction gear box 515, the output end of the reduction gear box 515 is fixedly connected to the center of the rotating end of the potentiometer 514, the input end of the reduction gear box 515 is fixedly connected to the transmission gear 516 meshing with the transmission rack 512, the conductive block 510 and the electrical connection bar 511 are connected in series to the power supply circuit of the force electromagnetic plate 48, and the potentiometer 514 is also connected in series to the power supply circuit of the force electromagnetic plate 48.

[0036] The operating principle of the present invention is described as follows: steam, carbon dioxide, and nitrogen are respectively injected into the gas injection well pipe 1 through the steam inlet pipe 7, the carbon dioxide inlet pipe 8, and the nitrogen inlet pipe 9. The ratio and the amount of the three gases are automatically programmed and controlled according to the actual oil production needs. By changing the opening and closing degree of the electric ball valve 21, the amount of steam, carbon dioxide, and nitrogen introduced into the steam inlet pipe 7, the carbon dioxide inlet pipe 8, and the nitrogen inlet pipe 9 can be adjusted to achieve the best oil production effect.

[0037] The gas mixer 10 installed on the gas injection well pipe 1 utilizes the turbulent flow in the gas mixer 10 to forcibly mix steam, carbon dioxide, and nitrogen, ensuring that a uniform mixed fluid is formed before entering the oil layer. This avoids the problem of uneven displacement effect in the oil layer and low oil recovery efficiency in some areas due to the large differences in the physical properties of the three gases (steam is a high-temperature fluid, carbon dioxide and nitrogen are room-temperature gases) that may easily cause stratification or local aggregation during injection.

[0038] When adjusting the amount of steam, carbon dioxide and nitrogen introduced, the encoder 22 connected to the rotating end of the electric ball valve 21 can provide real-time feedback on the opening and closing degree of the electric ball valve 21. The PLC controller can determine the amount of steam, carbon dioxide and nitrogen introduced based on the feedback of the opening and closing degree of the electric ball valve 21.

[0039] When the steam flow rate is less than 50 kg / h, the steam is transported to the gas mixer 10 through the steam inlet pipe 7 without pre-treatment of the steam. When the steam flow rate is greater than 50 kg / h, the PLC controller controls the solenoid valve 32 at the upper end of the steam inlet pipe 7 to close, and opens the solenoid valve 32 on the buffer pipe 31, so that the steam first passes through the buffer pipe 31, and a buffer box 33 is installed on the buffer pipe 31. The steam enters the buffer box 33 and passes through the porous distribution plate 34. The porous distribution plate 34 passes the pores (pore diameter is usually 1-3 mm) to High-speed steam is divided into thin streams, and the single-hole flow rate is reduced to 5-10m / s (the original steam flow rate is 20-30m / s), thereby reducing the impact kinetic energy on the carbon dioxide / nitrogen pipeline (kinetic energy is proportional to the square of the flow rate), and the contact area between the steam in the form of thin streams and carbon dioxide / nitrogen increases by 3-5 times, making heat exchange more uniform, avoiding local temperature differences exceeding 50°C (when the temperature difference is greater than 50°C, the condensate generation rate increases significantly), thereby reducing corrosion to the pipeline, and the PLC controller controls the action of the dual-axis motor 62 based on the amount of steam introduced. When the steam introduction is large, At 50kg / h, the larger the value, the longer the time that the PLC controller controls the dual-axis motor 62 to work, and the dual-axis motor 62 drives the adjusting screw 63 to rotate. Through the threaded connection between the adjusting screw 63 and the adjusting plate 64, the adjusting plate 64 cooperates with the U-shaped synchronous rod 65 to drive the two sealing plates 35 to move away from each other to a greater distance, thereby allowing a larger area of ​​the porous distribution plate 34 to be used for steam pretreatment. Because when the steam input amount is relatively small, the steam kinetic energy is low. At this time, the porous distribution plate 34 with a smaller area can achieve uniform steam flow field, and at the same time To avoid the problem that the steam flow resistance is too large and will affect the mixing efficiency, when the steam flow rate is larger, a larger area porous distribution plate 34 is used to pre-treat the steam, increase the steam dispersion path, and avoid local overheating. The porosity of the through holes on the porous distribution plate 34 gradually increases from the middle to the two sides, so that when the steam kinetic energy is increased, the problem of excessive steam flow rate caused by too low porosity and easy to exceed the erosion threshold is avoided. By gradually increasing the porosity of the porous distribution plate 34, the steam flow area is increased and the steam flow rate is gradually reduced, ensuring the stability of steam transportation.

[0040] The PLC controller controls the power supply device to supply power to the first thrust electromagnetic plate 57 based on the encoder 22 signal of the electric ball valve 21 on the steam inlet pipe 7. At the same time, based on the total gas flow rate fed back by the three sets of pipeline encoders 22, the power is supplied to the second thrust electromagnetic plate 59. When the steam flow rate is larger, the temperature of the pipeline will be higher due to the high temperature of the steam, and the power supply device is controlled to supply a larger current to the first thrust electromagnetic plate 57. When the first thrust electromagnetic plate 57 is energized, it will generate the same and larger magnetism as the first thrust permanent magnet plate 56, and then drive the temperature feedback plate 53 to slide a larger distance along the guide slide rod 52 to overcome the elastic force of the reset spring 55. When the total gas flow rate is When the pressure is too high, the power supply device also supplies a larger current to the second thrust electromagnetic plate 59, causing the pressure feedback plate 54 to slide a larger distance, and the temperature feedback plate 53 and the pressure feedback plate 54 move toward each other. That is, when the temperature is too high, the pressure is too high, or the temperature and pressure are too high, the conductive block 510 on the temperature feedback plate 53 will be connected to the electrical connection bar 511 on the pressure feedback plate 54, and then connected to the power supply circuit of the force electromagnetic plate 48 in the compensation pressurization fixing mechanism 4. The force electromagnetic plate 48 is energized to generate the same magnetism as the force-bearing permanent magnet plate 47, and then apply a magnetic thrust to the pressure plate 45. The pressure plate 45 cooperates with the pressure rod 42 to push the pressure block 43 to be pressed and fixed on the outside of the flange connection component 11 , applying additional locking force to the connection of the flange connection component 11, and when the temperature value is larger, the pressure value is larger, or the degree of combination of temperature and pressure is larger, the temperature feedback plate 53 and the pressure feedback plate 54 will be relatively closer, and the meshing action of the transmission rack 512 and the transmission gear 516 will drive the potentiometer 514 to rotate a larger angle, thereby making the access resistance of the potentiometer 514 smaller, and the potentiometer 514 is connected in series to the power supply circuit of the force electromagnetic plate 48, thereby causing the force electromagnetic plate 48 to pass a larger current, so that the pressure block 43 provides a larger extrusion force, ensuring the locking and fixing force of the flange connection component 11, because under the condition of higher temperature , thermal expansion will cause the sealing surface gap of the flange connection component 11 to increase more, and the locking force of the original flange connection component 11 cannot maintain the sealing specific pressure, and the heat dissipation conditions of the flange connection component 11 and the gas injection well pipe 1 are different. If the temperature of the flange connection component 11 is 50°C lower than that of the gas injection well pipe 1, radial temperature difference stress will be generated, causing the flange to warp, and the locking force needs to be increased to offset the warping deformation. When the gas pressure in the gas injection well pipe 1 increases, the molecular kinetic energy of the gas medium increases under high pressure, and the permeability is significantly enhanced. The sealing specific pressure of the flange connection component 11 needs to increase with the increase of pressure to ensure the sealing. Therefore, a larger locking force is also required to ensure the installation sealing of the flange connection component 11.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A steam, carbon dioxide, and nitrogen combined injection energy-saving and production-increasing oil production device, comprising a gas injection well pipe (1), wherein the upper end of the gas injection well pipe (1) is fixedly connected to a steam inlet pipe (7), a carbon dioxide inlet pipe (8), and a nitrogen inlet pipe (9), a gas mixer (10) is installed at the upper end of the gas injection well pipe (1), and a plurality of flange connection assemblies (11) are installed on the gas injection well pipe (1), characterized in that: Also includes: Three groups of inlet amount control feedback mechanisms (2) are fixedly connected to the steam inlet pipe (7), the carbon dioxide inlet pipe (8) and the nitrogen inlet pipe (9), respectively; A steam pretreatment mechanism (3) is fixedly connected to the wall of the steam inlet pipe (7); Multiple sets of compensating pressurizing fixing mechanisms (4) are fixedly mounted on the flange connection assembly (11) and are used to strengthen the fixing force of the flange connection assembly (11); The compensating pressurization starting mechanism (5) is fixedly mounted on the outer wall of the gas injection well pipe (1) and is used to control the action of the compensating pressurization fixing mechanism (4).

2. The steam, carbon dioxide, and nitrogen combined injection energy-saving and production-increasing oil production device according to claim 1, characterized in that: The inlet amount control feedback mechanism (2) comprises an electric ball valve (21) fixedly connected to the steam inlet pipe (7), the carbon dioxide inlet pipe (8) and the nitrogen inlet pipe (9); an encoder (22) is also fixedly mounted on the outer wall of the electric ball valve (21); an input end of the encoder (22) is fixedly connected to a rotating end of the electric ball valve (21).

3. The steam, carbon dioxide, and nitrogen combined injection energy-saving and production-increasing oil production device according to claim 1, characterized in that: The steam pretreatment mechanism (3) includes a buffer tube (31) fixedly connected to the steam inlet tube (7), solenoid valves (32) are installed on the tube walls of the steam inlet tube (7) and the buffer tube (31), a buffer box (33) is fixedly connected to the buffer tube (31), a porous distribution plate (34) is fixedly connected to the bottom side of the inner wall of the buffer box (33), and the inner wall of the buffer box (33) is symmetrically sealed with two sealing plates (35), and a two-way adjustment mechanism (6) for driving the two sealing plates (35) to move is fixedly installed at the rear end of the buffer box (33).

4. The steam, carbon dioxide, and nitrogen combined injection energy-saving and production-increasing oil production device according to claim 1, characterized in that: The compensating pressurizing fixing mechanism (4) includes a U-shaped positioning plate (41) fixedly connected to the outside of the flange connection assembly (11), the upper end of the U-shaped positioning plate (41) is symmetrically and movably sleeved with multiple pressurizing rods (42), the lower ends of the multiple pressurizing rods (42) are fixedly connected to the same pressurizing block (43), multiple pull-up springs (44) sleeved outside the pressurizing rods (42) are fixedly connected between the U-shaped positioning plate (41) and the pressurizing block (43), the upper ends of the multiple pressurizing rods (42) are fixedly connected to the same pressurizing plate (45), the upper end of the U-shaped positioning plate (41) is fixedly connected to a cover (46) sleeved outside the pressurizing plate (45), the upper end of the pressurizing plate (45) is fixedly connected to a force-bearing permanent magnet plate (47), and the top of the inner wall of the cover (46) is fixedly connected to a force-bearing electromagnetic plate (48) arranged opposite to the force-bearing permanent magnet plate (47).

5. The steam, carbon dioxide, and nitrogen combined injection energy-saving and production-increasing oil production device according to claim 4, characterized in that: The compensating pressurization starting mechanism (5) comprises a starting shell (51) fixedly mounted on the outer wall of the gas injection well pipe (1), the inner wall of the starting shell (51) is fixedly connected to a plurality of guide slide rods (52) arranged side by side, the rod walls of the plurality of guide slide rods (52) are symmetrically slidably connected to a temperature feedback plate (53) and a pressure feedback plate (54), and the temperature feedback plate (53) and the pressure feedback plate (54) are fixedly connected to the starting shell (51) with a plurality of guide slide rods (52) sleeved thereon. 2) an external return spring (55), the side wall of the temperature feedback plate (53) is fixedly connected to a first thrust permanent magnet plate (56), the inner wall of the starting shell (51) is fixedly provided with a first thrust electromagnetic plate (57) arranged opposite to the first thrust permanent magnet plate (56), the side wall of the pressure feedback plate (54) is fixedly connected to a second thrust permanent magnet plate (58), the inner wall of the starting shell (51) is fixedly provided with a second thrust electromagnetic plate (59) arranged opposite to the second thrust permanent magnet plate (58), one end of the temperature feedback plate (53) is fixedly connected to a conductive block (510), one end of the pressure feedback plate (54) is fixedly connected to an electrical connection bar (511) arranged corresponding to the position of the conductive block (510), the other end of the temperature feedback plate (53) is fixedly connected to a transmission rack (512), the other end of the pressure feedback plate (54) is fixedly connected to an L-shaped extension plate (513), and the side wall of the L-shaped extension plate (513) is fixedly connected to a potentiometer (51 4) and a reduction gear box (515), the output end of the reduction gear box (515) is fixedly connected to the center of the rotating end of the potentiometer (514), the input end of the reduction gear box (515) is fixedly connected to a transmission gear (516) meshing with the transmission rack (512), the conductive block (510) and the electrical connection bar (511) are connected in series to the power supply circuit of the forcing electromagnetic plate (48), and the potentiometer (514) is also connected in series to the power supply circuit of the forcing electromagnetic plate (48).

6. The steam, carbon dioxide, and nitrogen combined injection energy-saving and production-increasing oil production device according to claim 3, characterized in that: The bidirectional adjustment mechanism (6) includes two side plates (61) symmetrically fixedly connected to the rear side of the buffer box (33), and a dual-axis motor (62) is fixedly installed at the middle position of the rear end of the buffer box (33). The output ends of the dual-axis motor (62) are both fixedly connected to the adjustment screw (63), and the end of the adjustment screw (63) away from the dual-axis motor (62) is rotatably connected to the side wall of the side plate (61). The rod wall of the adjustment screw (63) is threadedly sleeved with an adjustment plate (64), and the side of the adjustment plate (64) away from the dual-axis motor (62) is symmetrically fixedly connected with two U-shaped synchronization rods (65), and the end of the U-shaped synchronization rod (65) away from the adjustment plate (64) extends through the buffer box (33) and is fixedly connected to the side wall of the sealing plate (35).

7. The steam, carbon dioxide, and nitrogen combined injection energy-saving and production-increasing oil production device according to claim 4, characterized in that: The lower end of the flange connection assembly (11) is fixedly connected to a U-shaped anti-slip plate (49), the lower end of the U-shaped positioning plate (41) is inserted into the inner side of the U-shaped anti-slip plate (49), and the U-shaped anti-slip plate (49) and the U-shaped positioning plate (41) are fixedly connected by a plurality of positioning bolts.

8. The steam, carbon dioxide, and nitrogen combined injection energy-saving and production-increasing oil production device according to claim 3, characterized in that: The porosity of the through holes on the porous distribution plate (34) gradually increases from the middle to both sides.

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